Double-layer rare earth ion doped YAG ceramic and preparation method thereof

Abstract

The invention discloses double-layer rare earth ion doped YAG ceramic and a preparation method thereof. The preparation method comprises the steps: mixing one or more of cerium oxide, gadolinium oxide, praseodymium oxide and chromic oxide with a mixture of aluminum oxide and yttrium oxide, and carrying out wet ball milling treatment, to obtain different mixed powder materials; respectively mixing the different mixed powder materials with a dispersing agent, an adhesive, a plasticizer and an organic solvent, and carrying out vibration ball milling to obtain different tape-casting slurry; respectively carrying out tape casting and drying on the different tape casting slurries to obtain different green bodies; laminating the two layers of different green bodies together for lamination treatment to obtain a double-layer YAG green body; and carrying out glue removal and sintering treatment on the double-layer YAG green body to obtain the double-layer rare earth ion doped YAG ceramic. The double-layer rare earth ion doped YAG ceramic prepared by the preparation method disclosed by the invention is variable in combination and more flexible in regulation and control of luminescence, and the color rendering index of the ceramic can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of preparation of thermoelectric energy conversion materials, in particular to a double-layer rare earth ion-doped YAG ceramic and a preparation method thereof. Background technique [0002] The current commercial LED / LD lighting technology mainly uses blue light to excite cerium (Ce) ion-doped yttrium aluminum garnet (Y 3 al 5 o 12 , YAG) phosphor, which is generally dispersed in organic resin and silica gel when used. However, due to the aging of organic resin and silica gel at high temperature, it is easy to cause Ce 3+ The quenching of luminescent ions reduces the quality of luminescence, so it cannot be used in high-power lighting. So researchers began to use glass, glass-ceramic and ceramic-based fluorescent materials to replace phosphors. Among them, ceramics have the characteristics of high thermal conductivity, easy ion doping and easy molding, and are currently a research hotspot in the field o...

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Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a double-layer rare earth ion-doped YAG ceramic and its preparation method, aiming at solving the problem that the existing ion-doped YAG ceramic cannot restore the color of the object itself well Problem with low color index

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